WO2022269107A1

WO2022269107A1 - Standalone transfer system for a wheelchair

Info

Publication number: WO2022269107A1
Application number: PCT/ES2022/070295
Authority: WO
Inventors: Sila Martinez Lopez
Original assignee: Sila Martinez Lopez
Priority date: 2021-06-24
Filing date: 2022-05-13
Publication date: 2022-12-29
Also published as: ES2881075A1

Abstract

The invention relates to a transfer system (1) for a wheelchair (2), comprising: a support structure (3), in turn comprising means (31) for coupling to the wheelchair (2), and a system of movable, articulated arms (32, 33), which can lift a user from the wheelchair (2) into a standing position; a lower base (4) with, at least, a movable turntable (41) which can rotate while supporting the user; actuators, which move the movable elements of the transfer system (1), said movable elements including, at least, the system of arms (32, 33) and the movable turntable (41); a control device (6) that controls the operation of the actuators; and a user securing means (5), configured to secure the user to the system of arms (32, 33).

Description

AUTONOMOUS TRANSFER SYSTEM FOR A WHEELCHAIR

DESCRIPTION

OBJECT OF THE INVENTION

The invention refers to an autonomous transfer system to transfer a user from/to a wheelchair, providing advantages and characteristics, which are described in detail below.

More specifically, the object of the invention refers to a system capable of transferring the user from his wheelchair to any other seat and/or transferring him back to it autonomously, without the need for external help.

FIELD OF APPLICATION OF THE INVENTION

The field of application of the present invention falls within the sector of the orthopedics industry, focusing particularly on the field of manufacturing aid devices and systems for the incorporation and transfer of people with reduced mobility.

BACKGROUND OF THE INVENTION

There are currently some solutions on the market to facilitate the transfer of people who suffer from some type of disability that makes it difficult for them to move. However, most of these solutions do not focus on a specific handicap and are too invasive for the user, so they do not promote the feeling of independence and autonomy in the patient for whom they have been designed. Some of the existing products are designed for older people who, although they have reduced mobility, are able to carry out most tasks without assistance; These types of solutions are too "poor" for people who use wheelchairs whose motor capacity is much more limited. Other transfer systems currently on the market are designed for totally dependent patients, so they can only be used with external help; these solutions cannot be used by the patient without the help or supervision of another person.

There is therefore a very large gap in solutions of an intermediate nature or focused solely on people with reduced mobility, since most of the products analyzed share the same drawbacks: need for external help, need to transport an additional element to the chair, difficult solution to handle... Also, none of the solutions found are automated.

One of the existing options on the market for the transfer of a person with reduced mobility into a vehicle is a device called "Slide Ride", consisting of a board that has a folding system that allows it to be stored in small spaces but it is necessary to transport it at all times apart from the chair itself and requires some external help for the transfer. This proposal is designed for people who, although they may depend on a wheelchair, are able to stand up.

Another option is a lifting crane, which is commonly used in hospitals to move people with reduced mobility. This option takes up too much space and again requires outside help. Also, due to the way it works (lifting the patient "wrapped" with a cloth) it makes the user feel uncomfortable. Another option is a sit-to-stand lift. This option is more pleasant for the user, since it allows some mobility despite not being an autonomous transfer system or being easily stored. The standing hoist is placed in front of the user, the belt is inserted through the back of the person to be transferred, the ends are hooked to the hoist and the ends are tightened manually or motorized; Once the user is incorporated, the attendant directs the lift to the desired place and loosens the tension exerted on the belt to let the patient fall again.

This solution "grabs" the user in the lower back, unlike the lifting crane that completely envelops it, which gives the user a greater sense of freedom as it allows them to have greater control of the situation. It is one of the most appropriate solutions for people with reduced mobility since its operating principle is to grab-incorporate-transport-deposit and it can be used outside the home, but like the rest of the solutions analysed, it requires the intervention of someone else to operate it and it is difficult to store.

Furthermore, what is called a transfer table is known. There are several models of transfer tables. The materials, shapes and prices are very varied in this type of solution. Despite their differences, all these models have a high risk of falling for the patient and require an effort to slide down the table and get to change chairs and are difficult to store and transport in the chair, in addition to always needing help to perform the transference.

The objective of the present invention is, therefore, to provide an alternative solution that the user of a wheelchair can use by himself and can always carry attached to the wheelchair to be able to transfer from it and return to the chair. wheels, either to lie down in bed, to sit in a chair, to get into the car, to go to the bathroom or to get into the shower, also allowing said transfer in minimal time, effortlessly and without the need for the supervision or help of another person.

In addition to the aforementioned transfer, another objective of the present invention is to provide a solution that allows the user to get up from the wheelchair and stand up effortlessly and without the need for the supervision or help of another person.

On the other hand, and as a reference to the current state of the art, it can be stated that there are no transfer systems outside of the wheelchair itself capable of transferring and/or incorporating the user without external help that can be transported with the patient in at all times without requiring any additional device.

More particularly, a system capable of adapting to several different models of wheelchairs is unknown and thus providing them with the ability to transfer and/or incorporate the user whenever they wish without the need for external help or physical effort, thus facilitating not only the work of the user himself, but also that of doctors, physiotherapists and other professionals who carry out this task with their patients on a regular basis during their workdays.

As a consequence, people with mobility problems spend hours sitting in the wheelchair in the same position, limiting their possibilities and further reducing their motor capacity, carrying out activities such as taking a nap or watching television without moving to bed or to the toilet. sofa. There are no known transfer systems capable of being able to simplify, at least partially, the task of transferring from one place to another without the help of another person and without physical effort.

Likewise, there are unknown transfer systems that adapt to the wheelchair instead of requiring its total replacement, in such a way that they favor not only the quality of life but also the economy of the user, by allowing him to keep the wheelchair.

In short, although different types and models of transfer devices are known, the existence of any autonomous transfer system to transfer a user from/to a wheelchair, or any other invention, is unknown, at least by the applicant. of similar application, which presents technical, structural and constitutive characteristics equal or similar to those presented by the one claimed here.

EXPLANATION OF THE INVENTION

The autonomous transfer system to transfer a user from/to a wheelchair that the invention proposes is an optimal solution to the aforementioned objectives, the characterizing details that make it possible and that distinguish it conveniently included in the final claims that accompany it. to the present description.

The transfer system that the invention proposes, as previously noted, is capable of transferring the user of a wheelchair in which said device is incorporated, from the wheelchair to any other seat and/or transfer him back to another seat. completely autonomously, without the need for external help.

For this, and more specifically, the transfer system of the invention, applicable for use with a wheelchair, preferably a motorized or electric wheelchair, comprises:

- a support structure which, in turn, comprises:

• means of coupling to the wheelchair; Y

• a movable and articulated arm system, capable of lifting a user from the wheelchair and putting him on his feet;

- a lower base with at least one mobile rotating plate, capable of rotating supporting the user; actuators, which print movement to mobile elements of the transfer system, said mobile elements being, at least, the arm system and the rotating mobile plate; a control knob, which controls the drive of the actuators; and a user fastening means, configured to fasten the user to the arm system.

Thanks to the transfer system, once the user is attached to it through the user restraint means, the following operating phases can be carried out by means of the control: move the structure to raise the user from his seated position in the wheelchair until he is in a standing or bipedal position,

- turn the mobile plate with the user on it in bipedal position, and

- move the structure again to lower and lower the user to the seated position, in a conventional chair, a bed, a bathroom, or another seat or piece of furniture, hereinafter transfer seat, to which you want to transfer and with respect to which previously The wheelchair will have been placed in front.

In addition, the transfer system is also capable of carrying out said movements in the opposite direction to lift the user from the transfer seat again, turn him on the movable plate and lower him to sit him back in the wheelchair.

The invention therefore provides an autonomous transfer system for people with reduced mobility who move using a wheelchair, for example an electric wheelchair, which is constituted as a completely autonomous system that accompanies the user in your day to day without preventing you from performing any of your usual tasks and facilitating transfers at all times. The transfer system is advantageously placed replacing the footrests of the user's wheelchair and adapts to most wheelchair models currently on the market.

The transfer system follows the steps that the user would carry out in a normal transfer, but in a way that is comfortable and simple for the user at all times and, above all, without the need for the help of third parties.

The transfer system of the invention allows the user to transfer to any other place or seat (chairs, sofas, vehicles, service...) without physical effort or external help, simply by placing his wheelchair at an angle, preferably from 30° up to 180° (in both directions) and controlling the movement by means of the control knob.

Advantageously, the estimated time of the longest transition (up to 180°) using the autonomous transfer system is approximately 20 seconds. The time saved by using this transfer system, compared to what is usually necessary, is significant. In addition, the saving of effort that it implies for the user and the independence that it grants must be taken into account.

In addition, the transfer system of the invention allows the user to get up from the wheelchair and stand up without physical effort or external help, which is very beneficial in multiple situations, such as, for example, your wedding, your graduation, a job interview, etc. This improves the user's quality of life, as well as their circulation and health.

Throughout the description and claims the word "comprises" and its variants are not intended to exclude other technical characteristics, components or steps. Furthermore, the word "comprises" includes the case "consists of". For those skilled in the art, other objects, advantages and characteristics of the invention will appear in part from the description and in part from the practice of the invention. The following examples are provided by way of illustration, and are not intended to be limiting of the present invention. Furthermore, the present invention covers all possible combinations of particular and preferred embodiments indicated herein.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, this specification is accompanied, as an integral part thereof, by a set of drawings in which, for illustrative and non-limiting, the following has been represented:

Figure number 1.- Shows an anterior-superior perspective view of an embodiment of the autonomous transfer system to transfer a user from/to a wheelchair object of the invention, represented independently of the wheelchair , appreciating the main parts and elements it comprises, as well as their configuration and arrangement.

Figure number 2.- Shows an anterior-superior perspective view of the example of the autonomous transfer system, according to the invention, shown in figure 1, in this case represented once coupled to a wheelchair.

Figure number 3.- Shows a side elevation view of the entire transfer system coupled to the wheelchair shown in the preceding figure.

Figure number 4.- Shows an anterior-superior perspective view of the wheelchair assembly with the transfer system of the invention shown in the preceding figures, in this case including the user arranged therein.

Figure number 5.- Shows a side elevation view of a detail of the transfer system, showing the lower base resting on the ground.

Figure number 6.- Shows a perspective view of the lower part of the transfer system, showing the lower base raised above the ground.

Figures number 7 and 8.- Show respective views in lateral-upper perspective of the upper arm comprising the structure of the transfer system, representing it respectively in the contracted and extended position.

Figures number 9, 10, 11 and 12.- Show respective perspective views of successive operating phases of the transfer system in an example of use to transfer the user from the wheelchair to a conventional chair located at 180°, appreciating the different phases of movement of each part of the transfer system.

Figure number 13.- Shows a perspective view of the user once located in the conventional chair to which he has been transferred, and in the extraction phase of the control knob.

Figure number 14.- Shows a perspective view of the user once located in the conventional chair to which he has been transferred, showing the removal method of the transfer system.

Figure number 15.- Shows a front elevational view of an embodiment of the control knob comprising the transfer system of the invention. PREFERRED EMBODIMENT OF THE INVENTION

In view of the aforementioned figures, and in accordance with the numbering adopted, an example of a non-limiting embodiment of the autonomous transfer system (1) of the invention can be seen in them, to transfer a user from/to a wheelchair. wheels (2), which comprises what is indicated and described in detail below.

The transfer system (1) of the invention, preferably electrically operated, is applicable for use with a wheelchair (2), preferably a motorized wheelchair. As can be seen in the figures, the transfer system (1) of the invention comprises the following elements:

A support structure (3), preferably a structure of profiles, and more preferably of tubular profiles. Structure (3) in turn comprises:

• coupling means (31) to the wheelchair (2), preferably to the chassis of the wheelchair (2); Y

• A mobile and articulated arm system (32, 33), capable of lifting the user from the wheelchair (2) and standing him up.

A lower base (4) with at least one mobile rotating plate (41), capable of rotating supporting the user. Preferably, the mobile plate (41) is capable of rotating up to 180°.

Actuators, which give movement to mobile elements of the transfer system (1), said mobile elements being, at least, the arm system (32, 33) and the mobile plate (41).

A control knob (6), which controls the activation of the actuators. The actuators are connected to the mobile elements of the transfer system (1), for example, by means of a physical cable or wirelessly.

A user fastening means (5), configured to fasten the user to the transfer system (1), preferably to the arms (32, 33).

Thanks to the transfer system (1), once the user is attached to it through the user restraint means (5), the following operating phases can be carried out using the control knob (6): move the structure (3) to raise the user from his sitting position in the wheelchair (2) (figure 4) to place him in a standing or bipedal position (figure 9),

- rotate the mobile plate (41) with the user on it in bipedal position (figures 10 and 11), and

- move the structure (3) again to lower and lower the user to the sitting position, in a conventional chair, a bed, a bathroom, or another seat or piece of furniture, hereinafter the transfer seat (7), to which you want transfer and with respect to the one that the wheelchair will have previously placed in front of (2).

In addition, the transfer system (1) is also capable of carrying out said movements in the opposite direction to raise the user from the transfer seat (7), rotate him on the mobile plate (41) and make him descend to sit him down again. the wheelchair (2).

According to the preferred embodiment, the user restraint means (5) is a restraint harness. The restraint harness is suitable for restraining both the user, preferably at his waist, and the transfer system (1), preferably the arm system (32, 33).

According to an alternative embodiment, the user restraint means (5) is the arm system (32, 33) itself, preferably some upper arms (33) that are defined below. According to this alternative, the arm system (32, 33) can act directly on the user in different ways, without the need for a restraint harness or the like. For example, the arm system (32, 33) itself can serve as a structure user support, you can include a specific area of support as a handle or handle, can be adjusted to the contour of a part of the user's body to grip, etc. In addition, the arm system may be ergonomically designed to facilitate support, grip, etc.

Preferably, the arm system of the structure (3) comprises:

Two main arms (32), which are joined by their respective lower ends to the mobile plate (41) of the lower base (4), preferably on both sides of the mobile plate (41); and they run upwards, preferably in a direction perpendicular to the mobile plate (41). According to a preferred embodiment, the main arms (32) run parallel to one another.

Two upper arms (33), which at one end (called the proximal end) are articulated to the upper end of the respective main arms (32); and at the opposite end (called the distal end) they are configured to hold the user, for example, hooking the restraint harness (5) that the user is wearing.

As used in this document, the term "end" must be understood in a broad and non-limiting sense, encompassing not only the termination of the corresponding element, but any other part that is in the vicinity of said termination.

According to particular embodiments, the connections between upper arms (33) and the respective main arms (32) can be made between points of the arms that are not ends, called intermediate points, or between the end of an arm (upper arm or main arm). and an intermediate point of the other corresponding arm.

The main arms (32) and the upper arms (33) are linked to each other through respective actuators. The drive of these actuators determines the tilting of the upper arms (33) with respect to the main arms (32) between a state of rest (figure 4) and a state of use (figures 9-11), going from one state to another to move the user from sitting position to standing position, or vice versa. According to a particular embodiment, the upper arms (33) are arranged parallel to the mobile plate (41) in the state of rest, and are arranged diagonally or perpendicularly to the mobile plate (41) in the state of use.

Preferably, the actuators that link the main arms (32) with the upper arms (33) for their tilting are actuator cylinders (34), and more preferably, hydraulic.

Preferably, the distal end of the upper arms (33) comprises an extensible arm section (33.1), more preferably, a telescopic section. This feature makes it possible to extend the length of the upper arms (33) to, for example, be attached to the harness (5) only when it is desired to use the transfer system (1); and allows the length of the upper arms (33) to be contracted when not in use, so that they do not interfere with the normal use of the wheelchair (2), as seen in figures 7 and 8, providing the user more space and comfort. Preferably, the extension/retraction of the extensible section of the arm (33.1) is carried out by means of an actuator (not noticeable in the figures), preferably an actuator cylinder incorporated within the profile itself. More preferably, this actuator cylinder is hydraulic.

On the other hand, at the distal end of each of the two upper arms (33) the existence of fasteners (33.2) has been provided for coupling the harness (5) to the upper arms (33). Preferably, said fasteners (33.2), as seen in figures 7 and 8, have a U-shaped configuration that protrudes inwardly from the corresponding upper arm (33), so that the height of the transfer system (1) does not increase. In addition, preferably, the lower part of the U-shaped cavity of said fasteners (33.2) has some small notches to ensure that the harness (5) remains fastened during the transfer operation. These notches are small so that they do not hinder removal harness (5) once the transfer is complete.

Preferably, the coupling means (31) to the wheelchair (2) are defined by respective lower coupling profiles that, arranged on both sides of the transfer system (1), are attached to the lower base at a lower end ( 4), preferably through respective connecting pieces (31.1); and at the opposite upper end, the coupling means are configured to be coupled to the wheelchair (2), preferably at the front, on both sides of the wheelchair seat (2). More preferably, the coupling means are fixed to the wheelchair (2) by fitting said profiles into the seats of the wheelchair (2) that all wheelchairs usually have to incorporate the footrests. In this way, the coupling means (31) fix the transfer system (1) to the wheelchair (2), while holding the lower base (4) of the same in front of the wheelchair seat ( 2) as a platform to support the user's feet. According to a preferred embodiment, the coupling means are parallel to each other.

Preferably, said fastening of the coupling means (31) to the wheelchair (2) is, as occurs with conventional footrests, easily removable, so that the user can place it or not, as appropriate.

Preferably, in order to provide the necessary stability for said rotation supporting the user, the lower base (4) has at least two positions: a rest position, in which it remains as a cantilever, raised above the ground, allowing the use of the wheelchair (2) normally, as can be seen in figures 3, 4 and 6, and a transfer position in which resting on the ground, as seen in figure 5, to safely carry out the movement of rotation of the mobile plate (41).

Preferably, the coupling means (31) comprise separate extensible sections, called extensible coupling sections (31.2), which allow the lower base (4) to be moved to regulate its vertical position and place it in the rest position or in the transfer position. . According to a preferred embodiment, the extensible coupling sections (31.2) are arranged at the lower end of the respective coupling means (31).

Preferably, the extension/retraction of the extensible coupling sections (31.2) is carried out by means of respective actuators (not visible in the figures), preferably cylinders housed inside the respective profiles. More preferably, these cylinders are hydraulic.

In this way, the user can modify the height of the transfer system (1) at any time, to climb steps, to enter under low tables, to modify the position of the legs, etc. According to a preferred embodiment, in an automated way, the transfer system (1) extends the coupling means (31) until the lower base (4) rests on the ground before each transfer.

So that the user can carry out all his activities without having to remove the transfer system (1) from the wheelchair (2) at any time, its height is such that it is easy to insert under any table. Thus, in the preferred embodiment, the height thereof, in its highest position, is below 70 cm, which is the minimum standard height of a dining table.

According to a particular embodiment, the transfer system (1) comprises one or more wheels on the lower base (4), intended to be in contact with the ground to support the transfer system (1). According to another particular embodiment, the transfer system (1) comprises one or more legs on the lower base (4), intended to be in contact with the ground to support the transfer system (1).

Optionally, both the wheels and the legs of one or another particular embodiment can be foldable. In the case of the legs, for example, this allows them to be unfolded when the transfer system (1) is to be used, and retracted during normal use of the wheelchair (2) so that the transfer system ( 1) does not impede progress. The unfolding/retracting of the legs can be automated, so that they automatically unfold to start the transfer and retract when finished.

In addition, preferably, the entire structure (3) can be adjusted in terms of its separation from the wheelchair (2), to place it in the ideal position according to each type of wheelchair and user preference. To do this, in the preferred embodiment, the coupling means (31) are coupled at their upper end to the wheelchair (2), as shown in figure 6, by means of an elbow (31.3) formed by two pieces with a union based on retractable lugs (31.4) that can fit from different holes, similar to the tube unions of crutches or similar devices, allowing the angle of coupling between both pieces of the elbow (31.3) to be varied and, consequently, the inclination of the coupling means (31).

Likewise, to ensure that the lower base (4) is maintained in a horizontal position, the connecting pieces (31.1) between the lower end of the coupling means (31) and the lower base (4) are preferably adjustable in angle. .

Preferably, the mobile plate (41) of the lower base (4), on which the user rotates, is incorporated on a lower fixed plate (42), with a crown (43) between them linked to a main turning motor ( not represented) that provides the turning movement to the mobile plate (41). In this way, the mobile plate (41) together with the arm system (32, 33) define a rotating transfer module, which can rotate relatively with respect to a base module, defined, in turn, by the fixed plate ( 42) of the lower base (4) and the coupling means (31) to the wheelchair (2). Preferably, the lower base (4) is capable of supporting up to 136 kg.

In a preferred form, the main motor that rotates the mobile plate (41) is incorporated in the lower part of the lower base (4), in a housing provided for this purpose, in which, in addition, rechargeable batteries are also incorporated that feed to the motors, as well as a control board for the entire transfer system (1).

Preferably, the upper surface of the mobile plate (41), since it is intended as a support for the user's feet, presents a non-slip pattern to prevent any accidental slipping.

Preferably, the electrical supply of the actuators of the transfer system (1) is provided by batteries (not shown) that, more preferably, are incorporated under the fixed plate (42) of the lower base (4) together with an electronic board of control suitably protected within a protective casing (44) provided for this purpose. According to a particular embodiment, in the event that the wheelchair (2) is electric, the transfer system (1) uses the battery of the wheelchair (2) itself as a power source.

Preferably, the transfer system (1) includes a charging socket for connecting the batteries to a socket, in order to recharge them. The charging socket can be located at any point on the transfer system (1) or on the wheelchair itself (2). Preferably, the charging socket is located in the control knob (6) itself or in a place close to the user's area of action; so that it is more comfortable and easy to load, especially considering that the user is a person with reduced mobility. According to a particular embodiment, the charging socket is located in the lower part of the transfer system (1), and more particularly in the lower base (4).

Preferably, the protective casing (44) is provided with ribs that give it rigidity and provide greater protection to the elements it contains while improving the support of the transfer system (1).

In a preferred form, all the wiring that allows the control of actuators and arms is directed to the lower base (4), which is covered by a casing (44) in charge of protecting and unifying the components that allow the control of the control system. transfer (1), having planned its insertion inside the profiles to prevent them from getting caught or disturbing.

The transfer system (1) can also comprise a means for supporting and/or holding the user at the height of the shins. Preferably, this means comprises two shin-holding elements (8) coupled to the arm system (32, 33), more preferably to respective main arms (32). According to a preferred embodiment, the shin support elements (8) are movable between an open position (figure 4) and a closed position (figures 5 and 6) in which they collaborate in supporting the user during the transfer operation, allowing the user to use it or not during the transfer operation.

Preferably, the transfer system (1) comprises one or more auxiliary motors (not shown) to move the shin holders (8) from one position to another.

Likewise, at least the internal face of the shin guards (8), which is the face intended to be in contact with the user's legs, preferably has padding to prevent the user from rubbing. On the other hand, according to the preferred embodiment shown in figures 1 and 2, the user restraint means (5) is a harness in the form of a seat, which has an opening (51) allowing the user to carry it at all times, even to go to the bathroom; The harness (5) has anchors (52) to be held by the upper arms (33) of the transfer system (1) and a front closure (53), optionally sailboat with a strap that facilitates its removal. Preferably, the harness (5) is made of neoprene, since it is a breathable, resistant, washable and easy-drying material.

Finally, the control command (6), preferably remote control, in the preferred embodiment is incorporated removably coupled in the support structure (3), preferably in one of the upper arms (33), so that is easily accessible to the user.

In the preferred embodiment, the remote control knob (6), as seen in figures 7 and 8, as well as in figure 15, is divided into two main parts:

A lower part (61) that serves as an anchor, with a channel (61.2) that allows the lower part (61) to be placed using one or more guides, and that adheres, for example, by magnetization to any of the two upper arms ( 33) of the structure (3) of the transfer system (1), being able to choose both the right and the left for greater user comfort. Preferably, the force of the magnet that adheres said inner part (61) to the upper arm (33) is adjustable by means of a regulator button (61.1) to ensure that it does not come loose at any time. In this lower part (61) of the control knob (6) there is a housing where the battery that feeds it is located and that is wirelessly charged by being connected to the general transfer system at all times. And an upper control part (62), in which all the buttons and visual information devices are located, preferably lights. This part is easily removable to separate it from the lower part (61) by the user if he needs to take the control knob (6) with him in any of the transfers he makes for greater comfort. Preferably, both parts are connected at all times by means of a retractable filament (not shown) that allows said part of the control knob (6) to be easily retrieved in the event of its accidental fall.

Preferably, the upper part (62) of the control knob (6) comprises a visual information device (DIV) in the form of a light indicator (62.1) of a representation of the parts of the transfer system (1), a selection button (62.2), movement control pushbuttons (62.3), an on/off button (62.4) and system charge indicator, also illuminated (62.5).

In this way, the user turns on the transfer system (1) with the on/off button (62.4) and presses the selection button (62.2), which activates a light next to the part that allows it to be controlled. Pressing again, the light changes to another one of the pieces and so on, so that when the user selects the piece he wants to move, he can use the movement control buttons (62.3) with arrows to control the movement of said piece. In addition, a battery control is added that allows monitoring the charge of the complete transfer system (1).

In addition, preferably, the control knob (6), in said upper part (62) includes some speakers (62.6) that allow warning audio messages to be sent to the user, if configured to do so, such as, for example: “Low battery”, “Starting transfer”, “Remember to attach the clamp", etc.

With all this, for the use of the described example of the autonomous transfer (1) of the invention, the following steps are followed:

- Placement of the transfer system (1), the harness (5) and the control knob (6).

This step is performed only once and is the only step that may require outside help. To place the structure (3) the footrests of the wheelchair (2) are removed and it is put in its place. In addition, the harness (5) is arranged on the seat of the wheelchair (2) so that the user sits on it, and the remote control (6) is placed on the upper arm (33) that the user wants. Username.

- Placement of the wheelchair (2) in the desired position.

With the transfer system (1) already installed, the user drives his wheelchair (2) to a place close to the transfer seat (7), forming an angle with it, for example, between 30° and 180°. to facilitate the change. The angle between the source chair and the destination chair depends on the available space.

- Height adjustment.

Next, the user adjusts the height of the lower base (4) to be able to place the feet resting on the mobile plate (41) in a comfortable position.

This variation of the height of the transfer system (1) is controlled by the control knob (6) and executed by the actuators in the lower part of the structure (3). The height of the lower base (4) can be adjusted at any time whenever the user requires it, for example, when he wants to sit on a low table, when he wants to go up a step, when he is going to carry out a transfer... but it is essential at the moment prior to carrying out a transfer, since it must rest on the ground in order to transmit the efforts to the surface and not overload the profiles of the transfer system (1). Preferably, the transfer system (1) incorporates a limit switch sensor in the lower base (4). The transfer system (1) does not allow the transfer to be carried out if the ground is not first detected by said sensor placed in the lower part of the lower base (4).

- Placement of shins holder (8).

The user has the option of placing the shin guards (8) in the closed position to provide greater protection during the transfer.

The user can decide whether or not to add this extra protection, since each user has different motor skills and what may seem like a help to some, could be an impediment to others.

- Fasten the harness (5).

Before starting the transfer, the user fastens the harness (5). The harness (5) can be fastened at all times if the user has very limited mobility to fasten and unfasten it, although in the preferred embodiment it is designed to allow the possibility of wearing it without tying until it is time to transfer and thus alter user habits as little as possible. Preferably the harness (5) has as a closure (53) a sailboat strap on the front that facilitates its placement, and a strap to pull the sailboat more easily when you want to untie it.

- Extension of the upper arms (33) and attachment to the harness (5).

After placing, if desired, the shin restraints (8), the user proceeds to select the upper arm (33) on the control knob (6) in order to extract it and hook the harness (5) to its distal end with greater ease.

- Incorporation until it is above the armrest.

Once the harness (5) is correctly hooked, the actuators responsible for moving the structure (3) are selected to tilt the upper arms (33) from their horizontal to vertical position to incorporate the user and, keeping the button on the control knob (6) pressed, the transfer system (1) begins to lift the user from his wheelchair (2). The height of incorporation will be at least the one marked by the armrests of the wheelchair (2), since the user must pivot on his feet once incorporated and if the height is lower, he could get caught or get hurt.

- Turn until you are on top of the transfer seat (7).

When the user is incorporated, he selects the mobile plate (41) on the control knob (6) and starts the turning movement; The transfer system (1) stops rotating when the user releases the button, thus providing greater precision and ensuring that the user can position himself exactly on top of the destination transfer seat (7).

- Descent.

After finishing the rotation, the actuators of the structure (3) are selected again, this time pressing the button in the opposite direction, so that the upper arms (33) return to their horizontal position until the user is seated on the seat. transfer device (7) without any tension exerted on the harness (5).

- Unhook the harness (5).

With the upper arms (33) still extended, the user has the possibility of unhooking the harness (5) or if he wishes to remain hooked to save time when returning, for example, if he has transferred only to go to the bathroom, since The harness (5) has a lower opening (51) designed for said need.

- Extraction of the control knob (6) and removal of the transfer system (1). Once the user is in the transfer seat (7) they can remove the control knob (6) to control the transfer system (1) and remove it if desired. Removing the control knob (6) is an alternative optional, since many times the wheelchair (2) could be moved away using its own control and keeping the transfer system (1) in the final position ready for the return.

The wheelchair (2) can be pushed aside by the user himself, extending his arm, or by a companion if he prefers. In the user's home, the wheelchair (2) would always be kept close to be able to return to it easily, so removing it with the control knob (6) stretching out the arm would be the most appropriate option, however, in restaurants or public areas where people usually go accompanied, the wheelchair (2) could be removed by another person.

In figures 9 to 14 the main operating phases of the transfer system (1) have been represented in an example of a transfer from the electric wheelchair (2) to a conventional transfer chair (7) located at 180°, it must be understood that this same transfer could be carried out with the wheelchair (2) located at a different angle. The placement of both chairs will depend on the space available to the user at the time of transfer.

Preferably, the transfer system (1) object of the invention incorporates means to detect the fall of the user during the transfer process and to be able to generate an alarm. Said means for detecting the fall preferably consist of an inclinometer.

Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any expert in the field understands its scope and the advantages derived from it, stating that, Within its essentiality, it may be put into practice in other forms of embodiment that differ in detail from the one indicated by way of example, and which will also achieve the protection that is sought provided that it is not altered, changed or modify your fundamental principle.

Claims

1. Autonomous transfer system (1) for a wheelchair (2), characterized in that it comprises: a lower base (4) with at least one mobile rotating plate (41), capable of rotating supporting the user; a support structure (3) which, in turn, comprises:

• Coupling means (31) of the transfer system (1) to the wheelchair (2) that are joined at a lower end to the lower base (4), and at the other end are coupled to the wheelchair. (2) in such a way that they fix the transfer system (1) to the wheelchair (2) and support the lower base (4) as a footrest, and

• An arm system (32, 33) made up of two main arms (32) and two upper arms (33), the arm system (32, 33) being mobile and articulated, capable of lifting a user from the chair. wheel (2) and stand up; actuators, which print movement to mobile elements of the transfer system (1), said mobile elements being, at least, the arm system (32, 33) and the rotating mobile plate (41); a control knob (6), which controls the activation of the actuators; and a user fastening means (5), configured to fasten the user to the arm system (32, 33). characterized in that coupling means (31) comprise extensible coupling sections (31.2), in such a way that they allow the lower base (4) to be moved and positioned with respect to the wheelchair (2) in a rest position, in which is raised off the ground and acts as a footrest, or in a transfer position, where it is resting on the ground to carry out with stability and safety the movement of rotation of the mobile plate (41) supporting the user.

2. Transfer system (1) according to claim 1, in which the user restraint means (5) is a restraint harness, suitable for holding the user and the arm system (32, 33) by means of fasteners ( 33.2) and in that at the distal ends the upper arms (33) comprise an extensible arm section (33.1) in such a way that it allows the length of the upper arms (33) to be extended to be attached to the harness (5) only when desired use the transfer system (1); and allows the length of the upper arms (33) to be contracted when not in use, so that they do not interfere with the normal use of the wheelchair (2).

3. Transfer system (1) according to any of the preceding claims, in which the arm system of the structure (3) comprises: two main arms (32), which are attached to both sides of the mobile plate (41) of the lower base (4), and run upwards parallel to each other; and two upper arms (33), which by respective proximal ends are articulated to respective upper ends of the respective main arms (32), and by respective distal ends are configured to hold the user; so that the main arms (32) and the upper arms (33) are linked to each other through respective actuators, whose actuation determines the tilting of the upper arms (33) with respect to the main arms (32).

Transfer system (1) according to claim 3, in which the actuators that link the main arms (32) with the upper arms (33) for their tilting are actuator cylinders (34).

Transfer system (1) according to any of the preceding claims, in which the coupling means (31) are fixed to the wheelchair (2) in a removable manner.

Transfer system (1) according to claim 5, in which the coupling means (31) are fixed to the wheelchair (2) by fitting into housings in the wheelchair (2) provided to incorporate the footrests.

7. Transfer system (1) according to any of claims 5 to 6, in which the coupling means (31) are coupled at their upper end to the wheelchair (2) by means of an elbow (31.3) with retractable lugs. (31.4) that can fit into different holes, allowing the angle of inclination of the coupling means (31) to be varied.

8. Transfer system (1) according to any of the preceding claims, in which the mobile plate (41) of the lower base (4) is incorporated on a lower fixed plate (42), with a crown (43) between them. linked to a main motor of rotation that provides the movement of rotation to the mobile plate (41).

9- Transfer system (1) according to any of the previous claims, comprising batteries for the electrical supply of the actuators, incorporated in the lower base (4) together with an electronic control board and protected within a casing (44). .

10. Transfer system (1) according to any of the preceding claims, comprising two shin-holding elements (8) coupled to the main arms (32), which are movable between an open position and a closed position in which they collaborate in user support during the transfer operation.

Transfer system (1) according to claim 10, comprising auxiliary motors for moving the shin holders (8) from the open position to the closed position and vice versa.

12. Transfer system (1) according to any of claims 2 to 11, in which the harness is shaped like a seat and has an opening (51), anchors (52) to be held by the upper arms (33) and a front closure (53).

Transfer system (1) according to any of the previous claims, in which the control handle (6) is incorporated removably coupled in the support structure (3).

Transfer system (1) according to claim 13, in which the control knob (6) is divided into two parts:

- a lower part (61) that serves as an anchor, and that is placed by means of one or several guides, and adheres to the structure (3) by magnetization; Y

- An upper operating part (62), in which there are buttons and visual information devices, and which is removable to separate it from the lower part (61).

15. Transfer system (1) according to any of the preceding claims, in which it comprises means to detect the fall of the user during the process of transferring the latter and to be able to generate an alarm.